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0.3.PBRRIG0- ENGINE LATHE.

No. 494,383. 4Pa'sented- Mar. 28, 1893.

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Patented Mar. 28-,v 1893.

UNITED STATES PATENT OFFICE.

OSCAR E. PERRIGO, OF NEW HAVEN, OONNEOTICUT, ASSIGNOR TO THE NEW HAVENMANUFACTURING OOMPANY, OF SAME PLACE.

ENGINE-LATH E.

SPECIFICATION fOrmng part of Letters Patent NO. 494,383, dated March 28,1893.

Application filed September 19, 1892. $erial No. 446,254. (No model.)

To all whom it may concern:

Be it known that I, OSCAR E. PERRIGO, of NewHaven, in the county of NewHaven and State of Connecticut, have invented a new Improvenent inEngine-Lathes, (A;) and I do hereby declare the following, when taken inconnection with accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and Which said drawings constitute part of this specilication, andrepresent, in-

Figure 1, a broken view in end elevation of a lathe constructed inaccordance With my invention; Fig. 2, a plan view of the gears spreadout so as to show all of them, but preserving their relativefunctionalarrangement; 1

Fig. 3, a view in side elevation showing the same end of the lathe.

My invention relates to an improvement in 1 engine-lathes, the object'being to produce variable speed gear therefor Which nay be operatedto vary the speed of the feed-red, without removing and replacing anygears, as is now commonly done.

With these ends in view, my inventon consists in an engine-lathe havingcertain details of Construction and combinations of parts as; will behereinafter described and pointed out,

` v are larger than the gears H, H' and H2, and

in the clains.

C, of the lathe., A gear B', fixed to the inner end of the said stud,receives the power by Which the same is rotated., Asherein shown, 5

it is meshed into by a gear D, 'which i'n turn meshes intothe spindlefeed-gear E, which is of usual construetion, as are also the backgears Fand F', and the cone G. The gear'D, is one of two gears of a reversi'ngmechanism which is employed to reverse the direction in which the studB, is rotated. I have considered it sufficient to indicate suchmechanism by the gear D, as mechanisms for this purpose are Well knownin the art, and have no direct bearing upon my present invention. Thesaid head A, is provided with three gears A'\ all corresponding to eachother in size, and in the number of their teeth, but diiferentiated intheir radial distance from the center of the head, and also in thedistance of their oifset or projection from the face thereof, the studsA2, upon which they are mounted thereto varying in length. Bydifferentiating the gears A' radially and laterally, as described, theyare arranged to be meshed into the respective Steps of a cone of gearsH, H' and HZ, fixed to the stud B, as clearly shown by Fig. 2 of thedrawings, the smallest gear of the cone being located adjacent to theouter face of the swiveled head A, the next largest gear being next toit, and the next largest being next to that. It will thus be seen thatthe idle gears A',-though of the same size, will be driven at differentrates of rotation by means of the'gears H, H' and H2, which arediferentiated in size, and which constitute the cone of gears fixed tothe stad The said gears A', are brought by the right rotation of thehead A, into mesh respectively, with the' three gears I, I' and 12 of aloose cone of gears which is mounted on a stud 13, carried by theupwardly projecting arm J, of the stud-p'late J', which is of ordinaryconstruction. The said gears I I', l2

relative thereto are reversely arranged, as clearly shown by Fig. 2 ofthe drawings, the gears of these respective sets of gears or cones,being rightly calculated so that there rate of rotation inparted to theloose cone, according to the gear of 'the fixed cone from which power istaken* for driving 'the loose cone. A small idle gear K,'loosely mountedon the projecting outer end of the feed-screw L; transmits the motion ofthe loose cone to a gear M, larger in size, and fixed to the extremeouter end of the feed-rod M' which is thereby actuated. `It will thus beseen that by rotating the head A, With its three idle gears, thedifierentiated gears of the two cones nay be brought into action asdesired for increasing or decreasing the speed of the feedrod withoutremoving or replacing any gears, whereas in variable speed gears asheretofore will be a regular increase 'or decrease in the constructed,the lathe must be stopped and gears interchanged in order to accomplishthe same result, and I have found that I may rotate the head and varythe speed of the feed rod without even stopping the lathe.

As herein shown I have provided the swiveled head with three idle gears,and have constructed each of the cones with three gears, but thesenumbers may be varied if desired.

For looking the head in any of its adjustments, I have provided, asherein shown, a Spring actuated pin N, having its outer end constructedWith a knob or button N', and its inner end with a taper N2, to adapt itto enter suitable pockets a, formed at equal distances apart in theperiphery of the head A, the pin and its actuating spring being mountedin a box O, adapted to be screwed to the end O of the lathe. Thislooking device, however, may be replaced by any other device snitable tothe purpose. As herein shown, also, I have represented my invention inconnection with an ordinary stud-plate J',which is fulcrumed upon theprojecting outer end of the feedscrew L, and provided at its oppositeend with the usual handle J2, and segnentally slotted arn J 3. Thisplate carries an adjustable screW-outting gear P, which meshes into ascrew-cutting gear P', mounted upon the extreme outer end of the stud B,and into a screw-cutting gear P2, mounted upon the eX- treme outer endof the feed-screw L. It will be understood, however, that the train ofgears P, P' and P2 which drive the feed-screw L, are not affected intheir action by my improved variable gear for the feed-rod, nor aretheyin use at the same time therewith. Thus when the parts are in theadjustment as shown by Fig. 1 of the drawings, the screw-cutting gearsare cut out of action, so to speak, by the disengagement of the gear P,from the gear P', but when it is desired to put these gears into action,the stud-plate is lifted whereby the gear P, is intermeshed with thescrew P', and the loose cone of'gears comprising the gears I, I' and 12are cut out of action by being swung out of the range of the idle gearsA', carried by the swiveled head A. I may thus, if I choose, and it isthe construction I prefer to employ, combine my improved variable gearfor the feed-red With a train of gears for the feed-screw, so that I mayreadily, and Without the 'ernoval of any gears, convert the lathe forusing the feed-screw of the feed-red.

I would have it understood that I do not limit myself to theexactconstruction herein shown and described, but hold myself at libertyto make such changes and alterations as fairly fall within the limitsand scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In the feed-rod gear of an en ginelathe, the combination With thestud and the feed-rod thereof, of means for drving the said stud, a coneof gears fixed on the stud, a 'otatable head swiveled on the stud andcarrying gears differentiated in their radial distance from the stud andin their offset from the face of the head, and corresponding in numberto the steps of the said cone with which they are respectively meshed; aloose cone of gears corresponding in number to the gears carried by thesaid head which is rotated to bring it-s gears into mesh with the stepsof the said loose cone; means for looking the said head in any of itsadjustments, and connection between the said loose cone and the feedrod,substantially as described, and Whereby by rotating the head the speedof the rod may be varied within the limits of the gears and carried bythe said rotatable head, and comprised in the fixed and loose cones.

2. In the feed-red gear of an enginelathe, the combination with the studand the feed-rod and the feed-screw thereof, of means fordriving thestud, a cone of gears and a screW-cutting gear fixed to the said stud, arotatable head swiveled on the said stud and carrying idle gearsarranged to mesh into the cone of gears, a stud-plate swung on thefeed-screw, a loose cone of gears mounted on an arm of the said plateand meshed into by the gears of the rotatable head according to theadjustment of the same, means for looking the said head in any of itsadjustments, a red-gear mounted on the feed-rod, an idle gear mounted onthe feed-screw and connecting the said loose cone of gears with thered-gear, a screwcutting gear mounted on the feed-screw, and a gearcarried by the stud-plate and connecting the screW-cutting gearon thestud with that on the feed-screw, substantially as described, andwhereby by rotating the said head the speed of the rod may be raised,and by shifting the stud-plate the feed-red gear may be cut out of, andthe feed-sorew gear cutinto, action.

In testimony Whereof I have signed this specification in the presence oftwo subscribing witnesses.

OSCAR E. PERRIGO.

WVitnesses:

ROBERT A. BROWN, GEo. D. SEYMOUR.

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